Question

Problem III. You are working at a construction site that has the given groundwater flow conditions. Assume that head loss cannot be neglected in either the silt or the clay layers. Determine at the interface of the silt and the clay layers: a. Total vertical stress b. Effective vertical stress C. TOTAL horizontal stress (K = 0.35) Very very permeable sand 2 ft Clay 0.5 ft Silt 2 ft S1011111 SISWA W W WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW wwwwwwwwwwwwwwwwwwwwwwwwwwwww WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW Datum Layer Hydraulic Conductivity (cm/sec) | 1x 10²4 Sand Upper Layer Unit Weight (lb/ft) 100 (dry) 110 (sat) 112 115 ا د Clay Silt 1x107 3x106 ا hy he

Answer 1

a) Jotal sless o0x4(1205) ective vodical stress E Jotal stress -Pore walar Pressioe ter. Pore oater Pressune bepth water x unit wt 5xG2.4 93.6 PsS Etbechve veical stress 93. 6 256- : \62:4 PsS Jotal horizantal stvess = kox Jotal ventical stress =0 35 x 256 = 89.6Psf